A larger femoral head size has been shown to reduce hip dislocations and minimize instability. There are several reasons why they work.

First, they provide a larger surface area in contact with the acetabular cup (socket).

Second, a larger head gives a better ratio of size from the head of the femur to the neck. That’s important in allowing a larger arc of motion and preventing impingement or pinching of the femoral neck against the rim of the cup.

The surgeon usually puts a polyethylene (plastic) liner inside the cup (between the cup and the femoral head). With this liner in place, the larger head can sit deeper inside the cup, making it more difficult for the head to jump out of the cup and dislocate. Studies have verified that a thinner liner can hold up while still accommodating the larger femoral head. And improved materials have extended the wear on these heads. That’s important because larger heads do tend to wear more potentially reducing their long-term survival.

Finally, larger heads can potentially eliminate the risk of early dislocation with implants of all kinds (e.g., ceramic, metal-on-metal, polyethylene). That makes them useful for a large variety of patients who need a hip replacement or revision surgery such as your grandfather requires.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Dislocation is every patient’s fear after getting a new hip replacement. The surgeons call it instability. No matter what name you give it, the problem is troublesome for the patient and a complex challenge for the surgeon. Conservative (nonoperative) care is usually tried first. Once the hip is back in the socket, a brace may be applied and the patient is sent to physical therapy.

Not all surgeons use bracing in these situations. If they do, the brace used is called an abduction brace. It holds the hips apart and in a neutral position (not turned in or rotated out). The physical therapist will help your mother learn how to move safely while strengthening the muscles around the hip.

A special focus of treatment is to restore normal joint proprioception (sense of joint position) and kinesthesia (awareness of movement). Balance training is also very important. Before discharging her to home, the therapist will interview the family to find out what kind of changes need to be made at home. For example, throw rugs will have to be removed, additional lighting (especially for at night) may be needed, grab bars installed in and around the bathroom, and so on.

If a conservative approach doesn’t work and the hip dislocates again and again, then surgery may be needed. The surgeon may have to tighten up loose tissue and restore a balance to soft-tissue tension on all sides of the hip joint. If the implant is improperly positioned, it must be removed and realigned. The surgeon may need to replace the femoral head with a larger one. The goal is to prevent a recurrent (second) hip dislocation.

The good news is that only 10 per cent of patients who dislocate the hip after receiving a total hip replacement will dislocate it a second time. Your surgeon and the rehab team will help you navigate through this difficult time. Don’t hesitate to bring up your concerns and questions. They have knowledge of your mother’s health and hip condition that they can draw on to provide you with answers.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

It sounds like you might have a condition called femoroacetabular impingement (FAI). With FAI, the top of the femur (thigh bone) pinches the rim of the hip socket. The area that gets compressed is referred to as the acetabular rim. This type of impingement occurs most often when the hip is flexed and internally rotated.

Surgery is often recommended as the most successful treatment for this problem. There are three surgical choices: 1) surgical hip dislocation, 2) periacetabular osteotomy, and 3) hip arthroscopy. Surgical hip dislocation is considered the current gold standard, though some experts expect improved arthroscopic techniques will change that in the future. Surgical dislocation refers to taking the femoral head out of the socket and making adjustments and repairs as necessary, and then putting the head back in place. The operation can be done without cutting through the muscles and with the least amount of trauma possible.  Any damage to the labrum (rim of cartilage around the hip socket) can be repaired. Any problems with mismatch of the femoral head and neck with the acetabulum (hip socket) can be taken care of. This type of surgery allows for preservation of the joint, which is important in young, active adults.

Periacetabular osteotomy corrects the retroversion (tipped or tilted position of the acetabulum). The capsule surrounding the hip joint is cut open. The femoral head and neck are reshaped by shaving or cutting off portions of the bone. The goal is to correct the placement of the femoral head in the hip socket.

The third surgical option (hip arthroscopy) to treat FAI allows the surgeon to gain access to the inside of the joint without cutting it open. This avoids pulling the femoral head away from the socket. Arthroscopic surgery also makes it possible to reattach (rather than remove) a torn labrum.

Studies show that the best way to approach this problem is by restoring as normal hip anatomy as possible. Surgical hip dislocation is used with good success for patients with mild to moderate (but not severe) degeneration of the joint cartilage, surface, and surrounding capsule. It sounds like your surgeon is right on track with current evidence for best practice. You can always seek a second opinion to help you understand your condition and the various treatment options available.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Most surgeons perform a screening exam to look for high-risk patients. Patients who are considered high-risk don’t just have problems with alcohol use and abuse. They may have other significant health problems. Dementia, Alzheimer’s, diabetes, and heart disease are common in older adults who need a hip replacement. The presence of a drinking problem doesn’t mean the patient can’t be treated.

First of all, even older adults can get help for an addiction problem with alcohol or other drugs. A psychologist or social worker in the community who specializes in this type of problem can be very helpful.

Second, precautions can be taken to prevent falls and hip trauma. A physical therapist is the best one to assess both the patient and his or her home for ways to reduce the risk of falls and fractures or dislocations.

Third, if revision surgery is needed, the surgeon may want to put the patient in a brace or cast to slow him or her down and give the soft tissues a chance to heal. Sometimes, for the older adult (and especially someone with weak muscles or lax (loose) soft tissues), a specific type of implant is used that is less likely to dislocate. The surgeon may choose an implant with a larger femoral head and then cement the socket portion in place. Both of these steps help stabilize the joint.

So, it’s never too late to offer information that can help direct and guide treatment as well as prevent further complications. It may be best if the patient (in this case, your mother) disclose this type of information to the physician. Encourage your mother to confide in her surgeon. Having them work together to solve the problem is usually more helpful than family members stepping in without the patient’s permission.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com. The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of a visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

This test may have already been done on your grandson. Many nurses and pediatricians in birth centers and at clinics automatically test for developmental dysplasia of the hip (DDH). It wouldn’t hurt to ask if it has been done.

A family history of DDH is a risk factor for this condition. Girls are at greater risk than boys, but boys can have DDH. In fact, these two known risk factors (gender and history) aren’t really good predictors. Only about one out of every 75 babies with a dislocated hip actually have either of these risk factors.

But early detection is helpful in watching the condition. Many times the child develops just fine and doesn’t need any treatment. But for those who end up with an unstable hip, early intervention can help prevent surgery later.

The medical record should indicate the results of this test. Perhaps you could suggest your daughter call and ask if the test was done and what the results were. If the test was not conducted, then it can be done at the next well-baby check-up. Encourage your daughter to take the new baby to all of these early appointments.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com.The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Recurrent dislocation depends on several things. First, was the doctor, surgeon, or emergency staff able to put the hip back in place without another operation? If yes, that’s in your favor. The hip is more likely to remain stable if it was reduced without surgery.

Second, how long has it been since the dislocation? If you are still within the early postoperative period, your risk is higher than if you are several years past the total hip replacement.

Third, are you having any symptoms to suggest the joint is unstable? Does your leg give out from underneath you? Is there any pain? Any clicking or popping of the joint? If the answer is ‘no’ to all these questions, then your risk of another dislocation is less.

Make sure you talk with your surgeon about these concerns. The knowledge an exam and an X-ray can give goes a long way in reducing your fears.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com.The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

Loosening and dislocation of the implant are the two most common problems faced by patients after a total hip joint replacement. The rate of dislocation varies from study to study. One study reports 0.6 percent (fewer than one patient every 100).

Other studies report up to seven percent. A very large study placed this closer to 2 percent. The wide ranges in figures may be explained by who did the surgery. Doctors in large centers or hospitals who do more hip joint replacements have lower rates of dislocation.

Most studies report numbers from these large reviews. However, most hip replacements are done by surgeons who treat fewer patients.

For more information on this subject, call The Zehr Center for Orthopaedics at 239-596-0100 or visit www.zehrcenter.com.The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic.

The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic. For more information on this subject, visit www.zehrcenter.com.

  Many factors can play a part in hip dislocation after replacement. For example, which side of your hip is the scar located? Any position you get in that can push the hip in that direction has the potential to cause a dislocation.

When you are on your hands and knees, you have your body weight against that hip. If you twist or angle your body against the hip, injury can occur. Your weight and bone density are also important factors. Being overweight means that much more pressure through the hip. Having osteoporosis (brittle bones) or decreased bone density makes it harder for the bone to grow around the new implant and hold it in place. Bone or muscle weakness can also lead to injury.

Most patients are given positioning precautions for the first 12 weeks post-op. In theory at 12 months you should be free to assume any position possible. In practice, sometimes our theories (and hips) don’t hold up.

The information contained herein is compiled from a variety of sources. It may not be complete or timely. It does not cover all diseases, physical conditions, ailments or treatments. The information should NOT be used in place of visit with your healthcare provider, nor should you disregard the advice of your health care provider because of any information you read in this topic. For more information on this subject, visit www.zehrcenter.com ]]> http://www.naplesorthopedicsurgeon.com/how-could-i-have-dislocated-my-hip-after-a-total-hip-replacement/feed/ 0